Release v0.1.0

Added MVP (minimum viable product) with variables, environment variables and code execution.

New Features

• All tasks can be listed from command line
• Shebang support for commands
• Task dependencies
• Default tasks
• Template engine and variables interpolation are supported
• Environment variables customization
• Command line completion scripts
• devrc supports dotenv files
• Writing task commands in different languages
• Read Devrcfile contents from stdin
• Global and local defined variables and environment variables
• Override variables by command line option
• Dry run mode